/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.gtk.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class represent a column in a table widget.
*
* - Styles:
* - LEFT, RIGHT, CENTER
* - Events:
* - Move, Resize, Selection
*
*
* Note: Only one of the styles LEFT, RIGHT and CENTER may be specified.
*
* IMPORTANT: This class is not intended to be subclassed.
*
*/
public class TreeColumn extends Item {
int /*long*/ labelHandle, imageHandle, buttonHandle;
Tree parent;
int modelIndex, lastButton, lastTime, lastX, lastWidth;
boolean customDraw;
/**
* Constructs a new instance of this class given its parent
* (which must be a Table
) and a style value
* describing its behavior and appearance. The item is added
* to the end of the items maintained by its parent.
*
* The style value is either one of the style constants defined in
* class SWT
which is applicable to instances of this
* class, or must be built by bitwise OR'ing together
* (that is, using the int
"|" operator) two or more
* of those SWT
style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
*
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TreeColumn (Tree parent, int style) {
super (parent, checkStyle (style));
this.parent = parent;
createWidget (parent.getColumnCount ());
}
/**
* Constructs a new instance of this class given its parent
* (which must be a Table
), a style value
* describing its behavior and appearance, and the index
* at which to place it in the items maintained by its parent.
*
* The style value is either one of the style constants defined in
* class SWT
which is applicable to instances of this
* class, or must be built by bitwise OR'ing together
* (that is, using the int
"|" operator) two or more
* of those SWT
style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
*
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
* @param index the index to store the receiver in its parent
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TreeColumn (Tree parent, int style, int index) {
super (parent, checkStyle (style));
this.parent = parent;
createWidget (index);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is moved or resized, by sending
* it one of the messages defined in the ControlListener
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see ControlListener
* @see #removeControlListener
*/
public void addControlListener(ControlListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Resize,typedListener);
addListener (SWT.Move,typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected, by sending
* it one of the messages defined in the SelectionListener
* interface.
*
* widgetSelected
is called when the column header is selected.
* widgetDefaultSelected
is not called.
*
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener (SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Selection,typedListener);
addListener (SWT.DefaultSelection,typedListener);
}
static int checkStyle (int style) {
return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
void createWidget (int index) {
parent.createItem (this, index);
hookEvents ();
register ();
text = "";
}
void deregister() {
super.deregister ();
display.removeWidget (handle);
if (buttonHandle != 0) display.removeWidget (buttonHandle);
if (labelHandle != 0) display.removeWidget (labelHandle);
}
/**
* Returns a value which describes the position of the
* text or image in the receiver. The value will be one of
* LEFT
, RIGHT
or CENTER
.
*
* @return the alignment
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int getAlignment () {
checkWidget();
if ((style & SWT.LEFT) != 0) return SWT.LEFT;
if ((style & SWT.CENTER) != 0) return SWT.CENTER;
if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
return SWT.LEFT;
}
/**
* Returns the receiver's parent, which must be a Table
.
*
* @return the receiver's parent
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public Tree getParent () {
checkWidget();
return parent;
}
/**
* Gets the resizable attribute. A column that is
* not resizable cannot be dragged by the user but
* may be resized by the programmer.
*
* @return the resizable attribute
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public boolean getResizable () {
checkWidget();
return OS.gtk_tree_view_column_get_resizable (handle);
}
/**
* Gets the width of the receiver.
*
* @return the width
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int getWidth () {
checkWidget();
if (!OS.gtk_tree_view_column_get_visible (handle)) {
return 0;
}
int width = OS.gtk_tree_view_column_get_width (handle);
if (width == 0) {
width = OS.gtk_tree_view_column_get_fixed_width (handle);
}
return width;
}
int /*long*/ gtk_clicked (int /*long*/ widget) {
/*
* There is no API to get a double click on a table column. Normally, when
* the mouse is double clicked, this is indicated by GDK_2BUTTON_PRESS
* but the table column sends the click signal on button release. The fix is to
* test for doublc click by remembering the last click time and mouse button
* and testing for the double click interval.
*/
boolean doubleClick = false;
int /*long*/ eventPtr = OS.gtk_get_current_event ();
if (eventPtr != 0) {
GdkEventButton gdkEvent = new GdkEventButton ();
OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof);
switch (gdkEvent.type) {
case OS.GDK_BUTTON_RELEASE: {
int clickTime = display.getDoubleClickTime ();
int eventTime = gdkEvent.time, eventButton = gdkEvent.button;
if (lastButton == eventButton && lastTime != 0 && Math.abs (lastTime - eventTime) <= clickTime) {
doubleClick = true;
}
lastTime = eventTime == 0 ? 1: eventTime;
lastButton = eventButton;
}
}
OS.gdk_event_free (eventPtr);
}
postEvent (doubleClick ? SWT.DefaultSelection : SWT.Selection);
return 0;
}
int /*long*/ gtk_mnemonic_activate (int /*long*/ widget, int /*long*/ arg1) {
return parent.gtk_mnemonic_activate (widget, arg1);
}
int /*long*/ gtk_size_allocate (int /*long*/ widget, int /*long*/ allocation) {
boolean mapped = OS.GTK_WIDGET_MAPPED (widget);
int x = OS.GTK_WIDGET_X (widget);
int width = OS.GTK_WIDGET_WIDTH (widget);
if (width != lastWidth) {
lastWidth = width;
if (mapped) sendEvent (SWT.Resize);
}
if (x != lastX) {
lastX = x;
if (mapped) sendEvent (SWT.Move);
}
return 0;
}
void hookEvents () {
super.hookEvents ();
OS.g_signal_connect (handle, OS.clicked, display.windowProc2, CLICKED);
if (buttonHandle != 0) OS.g_signal_connect (buttonHandle, OS.size_allocate, display.windowProc3, SIZE_ALLOCATE);
if (labelHandle != 0) OS.g_signal_connect (labelHandle, OS.mnemonic_activate, display.windowProc3, MNEMONIC_ACTIVATE);
}
/**
* Causes the receiver to be resized to its preferred size.
* For a composite, this involves computing the preferred size
* from its layout, if there is one.
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
*/
public void pack () {
checkWidget();
int width = 0;
if (buttonHandle != 0) {
GtkRequisition requisition = new GtkRequisition ();
OS.gtk_widget_size_request (buttonHandle, requisition);
width = requisition.width;
}
if ((parent.style & SWT.VIRTUAL) != 0) {
//NOT DONE
} else {
int /*long*/ iter = OS.g_malloc (OS.GtkTreeIter_sizeof ());
if (OS.gtk_tree_model_get_iter_first (parent.modelHandle, iter)) {
do {
width = Math.max (width, parent.calculateWidth (handle, iter));
} while (OS.gtk_tree_model_iter_next(parent.modelHandle, iter));
}
OS.g_free (iter);
}
setWidth(width);
}
void register () {
super.register ();
display.addWidget (handle, this);
if (buttonHandle != 0) display.addWidget (buttonHandle, this);
if (labelHandle != 0) display.addWidget (labelHandle, this);
}
void releaseChild () {
super.releaseChild ();
parent.destroyItem (this);
}
void releaseWidget () {
super.releaseWidget ();
parent = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is moved or resized.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see ControlListener
* @see #addControlListener
*/
public void removeControlListener (ControlListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Move, listener);
eventTable.unhook (SWT.Resize, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Selection, listener);
eventTable.unhook (SWT.DefaultSelection,listener);
}
/**
* Controls how text and images will be displayed in the receiver.
* The argument should be one of LEFT
, RIGHT
* or CENTER
.
*
* @param alignment the new alignment
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setAlignment (int alignment) {
checkWidget();
if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
int index = parent.indexOf (this);
if (index == -1 || index == 0) return;
style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
parent.createRenderers (handle, modelIndex, index == 0, style);
}
void setFontDescription (int /*long*/ font) {
OS.gtk_widget_modify_font (labelHandle, font);
OS.gtk_widget_modify_font (imageHandle, font);
}
public void setImage (Image image) {
checkWidget ();
super.setImage (image);
if (image != null) {
OS.gtk_image_set_from_pixmap (imageHandle, image.pixmap, image.mask);
OS.gtk_widget_show (imageHandle);
} else {
OS.gtk_image_set_from_pixmap (imageHandle, 0, 0);
OS.gtk_widget_hide (imageHandle);
}
/*
* Bug in GTK. For some reason, the column button does not allocate the size
* of its internal children if its bounds is set before the image is set. The fix is to
* force this by calling gtk_widget_size_request() (and throw the results away).
*/
if (buttonHandle != 0) {
GtkRequisition requisition = new GtkRequisition ();
OS.gtk_widget_size_request (buttonHandle, requisition);
}
}
/**
* Sets the resizable attribute. A column that is
* not resizable cannot be dragged by the user but
* may be resized by the programmer.
*
* @param resizable the resize attribute
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setResizable (boolean resizable) {
checkWidget();
OS.gtk_tree_view_column_set_resizable (handle, resizable);
}
public void setText (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
super.setText (string);
char [] chars = fixMnemonic (string);
byte [] buffer = Converter.wcsToMbcs (null, chars, true);
OS.gtk_label_set_text_with_mnemonic (labelHandle, buffer);
if (string.length () != 0) {
OS.gtk_widget_show (labelHandle);
} else {
OS.gtk_widget_hide (labelHandle);
}
/*
* Bug in GTK. For some reason, the column button does not allocate the size
* of its internal children if its bounds is set before the text is set. The fix is to
* force this by calling gtk_widget_size_request() (and throw the results away).
*/
if (buttonHandle != 0) {
GtkRequisition requisition = new GtkRequisition ();
OS.gtk_widget_size_request (buttonHandle, requisition);
}
}
/**
* Sets the width of the receiver.
*
* @param width the new width
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setWidth (int width) {
checkWidget();
if (width > 0) {
OS.gtk_tree_view_column_set_fixed_width (handle, width);
OS.gtk_tree_view_column_set_visible (handle, true);
} else {
OS.gtk_tree_view_column_set_visible (handle, false);
}
}
}